It's the same for any team. Top line players get injured and you have to make compromises, that's obvious. Take away players like Dan Carter and Richie McCaw and NZ start looking less unstoppable - and they've both been injured in the near past.
I'm glad to have stand out players and not too worried about desperately pulling negatives out of it. We currently have a number of players in each position who could get the job done. It would take a hell of a lot of injuries before we start embarassing ourselves. Our "realistic" depth in each position, at least the way I see it, is as follows:
Props: Robinson, Slipper, Alexander, Kepu, Palmer, Baxter and even Daley brings something to the table.
Locks: Horwill, Sharpe, Simmons, Chisholm, Mumm all have winning test match experience while AWH, Van, Pyle and Wykes could probably get the job done if those 5 are in the same car accident.
Loose fowards: In terms of players who are often stand-outs in Super Matches we have Pocock, Hodgson, Robinson, McCalman, Palu, Elsom and Brown (test match impact is lacking though). There are others, like Saffy, who many have tipped to have the potential to step up to the plate if required.
Half-Backs: Genia, Burgess, Phipps
Fly-Halves: Cooper, Beale , Giteau and Barnes can all play at 5/8. 3 of them have won their share of test-matches there.
Inside Centre: Barnes, Giteau, JOC (James O'Connor), Fainga'a, Harris are all capable of playing this position at Test level in my opinion. Then add in different styles of inside centre like Mortlock, Carter etc and we definitely have options.
Outside Centre: AAC (Adam Ashley-Cooper), Ioane, Horne would all be excellent choices.
Wings: Ioane, Mitchell, Davies, Morahan, Turner, McCabe, JOC (James O'Connor)
Fullback: Beale, AAC (Adam Ashley-Cooper), JOC (James O'Connor), McCabe, Morahan
I know some of the above are listed and obviously they are not all first choice - but my point is that we do have decent depth and all of the players mentioned above could conceivably play some pretty decent Test football.